1. School of Food Science and Technology, Dalian Polytechnic University, National Engineering Research Center of Seafood, No.1 Qinggongyuan, Dalian 116034, P. R. China
2. Department of Statistics, Iowa State University, 2438 Osborn Drive, Ames, Iowa 50011, United States
3. Roy J. Carver Department of Biochemistry, Biophysics & Molecular Biology, Iowa State University, 3192 Molecular Biology Building, Ames, Iowa 50011, United States